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Titanium dioxide precoated dynamic membrane photocatalytic water treatment device

A technology for membrane photocatalytic water and titanium dioxide, which is applied in the fields of oxidized water/sewage treatment, light water/sewage treatment, energy and waste water treatment, etc. effects, etc.

Inactive Publication Date: 2010-07-28
JIUJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also some shortcomings: in the continuous operation process, the organic pollutants entering the reactor have a certain residence time distribution, and some small molecular organics pass through the separation membrane before being completely oxidized and flow out together with the permeate , which affects the final treatment effect; in addition, there are some small and medium molecular organic pollutants that have not been fully oxidized and entered the membrane pores, causing membrane pore clogging, especially when the pressure difference is high, the clogging is more serious, and the membrane surface will form The filter cake layer causes serious pollution to the separation membrane, and the membrane flux decreases significantly, which increases the frequency of replacement and cleaning of the filter elements of the membrane module, especially the clogging of the membrane pores makes the cleaning and regeneration of the separation membrane more difficult

Method used

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  • Titanium dioxide precoated dynamic membrane photocatalytic water treatment device
  • Titanium dioxide precoated dynamic membrane photocatalytic water treatment device
  • Titanium dioxide precoated dynamic membrane photocatalytic water treatment device

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Utilize above-mentioned device to process methyl orange waste water, waste water concentration is 0.8g / l, and pH value is 4.2, adopts 20-100W high-pressure mercury lamp, and the effective reaction volume of two reactors in the device is 5-8 liter, adds 6 wherein Anatase TiO 2 ,TiO 2 The average particle size is 0.2 μm. The ceramic membrane material used is Al 2 o 3 , 3 ceramic membrane tubes, the average pore diameter is 0.1μm, the length is 30cm, the outer diameter is 13mm, the inner diameter is 9mm, the reaction temperature is 25-30°C, the suction negative pressure is stable within the range of 0.06-0.08MPa, and the air intake The gas velocity (corrected) is stable at 15-30L / min, the gas recoil pressure is 0.4MPa, and the gas recoil time is 8s. Under the above conditions, the pre-coated dynamic membrane is prepared first, then the methyl orange wastewater is treated, and finally the membrane is cleaned and regenerated to complete a cycle of operation. Monitoring ...

Embodiment 2

[0023] Utilize above-mentioned device to process methyl orange waste water, waste water concentration is 0.9g / l, and pH value is 4.3, adopts 20-100W high-pressure mercury lamp, and the effective reaction volume of two reactors in the device is 5-8 liters, adds 7 wherein Anatase TiO 2 ,TiO 2 The average particle size is 0.2 μm. The ceramic membrane material used is Al 2 o 3 , 4 ceramic membrane tubes, the average pore diameter is 0.1μm, the length is 30cm, the outer diameter is 13mm, the inner diameter is 9mm, the reaction temperature is 25-30°C, the suction negative pressure is stable within the range of 0.06-0.08MPa, and the air intake The gas velocity (corrected) is stable at 15-30L / min, the gas recoil pressure is 0.4MPa, and the gas recoil time is 8s. Under the above conditions, the pre-coated dynamic membrane is prepared first, then the methyl orange wastewater is treated, and finally the membrane is cleaned and regenerated to complete a cycle of operation. Monitoring...

Embodiment 3

[0025] Utilize above-mentioned device to process methyl orange waste water, waste water concentration is 0.7g / l, and pH value is 4.1, adopts 20-100W high-pressure mercury lamp, and the effective reaction volume of two reactors in the device is 5-8 liter, adds 5 wherein Anatase TiO 2 ,TiO 2 The average particle size is 0.2 μm. The ceramic membrane material used is Al 2 o 3 , 2 ceramic membrane tubes, the average pore diameter is 0.1μm, the length is 30cm, the outer diameter is 13mm, the inner diameter is 9mm, the reaction temperature is 25-30°C, the suction negative pressure is stable within the range of 0.06-0.08MPa, and the air intake The gas velocity (corrected) is stable at 15-30L / min, the gas recoil pressure is 0.4MPa, and the gas recoil time is 8s. Under the above conditions, the pre-coated dynamic membrane is prepared first, then the methyl orange wastewater is treated, and finally the membrane is cleaned and regenerated to complete a cycle of operation. Monitoring ...

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Abstract

The invention discloses a titanium dioxide precoated dynamic membrane photocatalytic water treatment device which mainly comprises a precoated dynamic membrane photocatalytic reactor 13 and a prereactor 16. The precoated dynamic membrane photocatalytic reactor 13 is internally provided with an ultraviolet lamp 9-1, a ceramic membrane tube 8 and a gas-distributing plate 7-1 and connected with a suction pump 1 and an air compressor 5 at the bottom, the prereactor 16 is internally provided with an ultraviolet lamp 9-2 and a gas-liquid distributing plate 7-2, and the precoated dynamic membrane photocatalytic reactor 13 and the prereactor 16 are connected by a water inlet pipe 14 and a water outlet pipe 12 to form a loop. By adding titanium dioxide precoated dynamic membrane to a floating photocatalytic reactor for integration, the invention not only has the advantages of great solid-liquid contact area, high reaction efficiency, simple precoated dynamic membrane preparation, full catalyst recycle, and the like, but also can effectively lessen the pollution of the ceramic membrane tube 8, prolong the operation period of the device, simplify the cleaning regeneration process of the ceramic membrane tube 8 and decrease the operation cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a titanium dioxide precoated dynamic film photocatalytic water treatment device. Background technique [0002] In recent years, semiconductor photocatalytic advanced oxidation technology has been developed rapidly as a new and efficient wastewater treatment technology. Under the irradiation of ultraviolet light or sunlight, the semiconductor photocatalyst can generate holes, which then react with water molecules to generate strong oxidizing hydroxyl radicals, which can effectively oxidize various organic substances in water. This technology has the advantages of simple operation, low energy consumption, high degree of mineralization, normal temperature and pressure reaction, non-toxic catalyst, low cost and reusable use, etc. Its application prospect is very broad, so it has been highly praised by relevant scholars at home and abroad. Pay attention t...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/32
CPCY02W10/37
Inventor 杨涛杨期勇李国朝
Owner JIUJIANG UNIVERSITY
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